4f6dcead-fd4c-4ae5-83ac-25694c9daf9b English ISO/IEC 8859-1 (also known as Latin 1) dataset dataset NERC EDS Environmental Information Data Centre Lancaster Environment Centre, Library Avenue, Bailrigg Lancaster LA1 4AP UK info@eidc.ac.uk https://eidc.ac.uk/ EIDC website The Environmental Information Data Centre (EIDC) is the UK's national data centre for terrestrial and freshwater sciences. information pointOfContact 2025-11-21T09:29:15 UK GEMINI 2.3 OSGB 1936 / British National Grid Plynlimon research catchments: digital terrain model 2010-06-18 publication 1364210594753 CEH:EIDC: https://catalogue.ceh.ac.uk/id/4f6dcead-fd4c-4ae5-83ac-25694c9daf9b Hydrologically corrected digital terrain model (DTM) of Plynlimon catchments. The DTM was derived from digitised elevation data from scanned topographic maps. UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk pointOfContact Centre for Ecology & Hydrology enquiries@ceh.ac.uk originator NERC EDS Environmental Information Data Centre info@eidc.ac.uk custodian UK Centre for Ecology & Hydrology enquiries@ceh.ac.uk owner notPlanned Completed Elevation theme GEMET - INSPIRE themes, version 1.0 2008-06-01 publication digital land model river GEMET - Concepts, version 4.1.3 2019-01-28 creation United Kingdom Wales GeoNames 2006-01-01 creation Mapping Water quality Hydrology plynlimon severn hafren hore tanllwyth wye gwy cyff iago digital terrain model DTM digital elevation model DEM ground surface stream otherRestrictions no limitations otherRestrictions This resource is made available under the terms of the Open Government Licence otherRestrictions © UK Centre for Ecology & Hydrology grid 15 English utf8 elevation 1968-12-31 -3.821 -3.633 52.415 52.514 ASCII grid NERC EDS Environmental Information Data Centre info@eidc.ac.uk distributor https://data-package.ceh.ac.uk/sd/4f6dcead-fd4c-4ae5-83ac-25694c9daf9b.zip Supporting documents Documents available to assist in re-use of this dataset. information https://data-package.ceh.ac.uk/data/4f6dcead-fd4c-4ae5-83ac-25694c9daf9b Download the data Get a copy of this data download dataset dataset Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 Plynlimon digital terrain model was derived from digitised elevation data. The elevation data had been digitised from scanned topographic maps (reference below). Once the elevation data was captured (spot heights and contour lines) a TIN was created which was then used to derived a hydrologically corrected, grid-based DTM. All the processing was done in ARCINFO however it was not documented therefore no further details can be provided. Topographic maps reference: Plynlimon Catchment Areas - Severn Catchment. Sheet No. 1. Scale 1:5000. Wallingford, Berkshire. Institute of Hydrology, Natural Environmental Research Council, 1968. Plynlimon Catchment Areas - Wye Catchment. Sheet No. 2. Scale 1:5000. Wallingford, Berkshire. Institute of Hydrology, Natural Environmental Research Council, 1968.